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VIA SOM-6X80 User Manual
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A.3.24.
SIM Card Slot
The SOMDB3 carrier board comes with an onboard SIM card slot that supports 3G/4G SIM cards. The SIM card
slot on the SOMDB3 carrier board will only be enabled when a 3G/4G module is installed in the miniPCIe slot.
The SIM card slot is labeled as “SIM1”. The pinouts of the SIM card slot are shown below.
Table 21: SIM card slot pinouts
Note
:
Using a miniPCIe module with a built-in SIM card slot will disable the onboard SIM card slot.
Figure 39: SIM card slot diagram
Pin
Signal
1
USIM_VCC
2
USIM_RST1
3
USIM_CLK1
4
N/A
5
GND
6
UIM_VPP1
7
USIM_DATA1